Dark Siren , save file issues—such as progress not saving or custom changes being reverted—are common due to the game's strict data-handling and Steam Cloud syncing. Locating Your Save File
If Steam keeps overwriting your "fixed" save file with an older version, disable Steam Cloud for Dark Siren in the game's Properties menu before replacing the file. Recovering Corrupted Saves
If you see a "Save file corrupt" message, it’s often a false alarm caused by a sync clash.
For PS5:
